I LOVE MANDIBUZZ SO MUCH

This gal makes for an amazing wall in RU.It can take a Stone Edge and Hi Jump Kick from Hitmonlee pretty well and we all know how common they are in RU. Set up a few Iron Defenses and this guy is nearly impossible to take down with any physical attack.Paired with Big Peck nobody can take you down a notch when you do get those Defenses up. The nature lowers the Speed so you can use Payback more efficiently+ STAB equals a hard hitting move against any pokemon. Roost is to heal off any damage you taken from setting up and Brave Bird. Brave Bird may cause a lot of recoil but with Roost its really not that big of a problem, and its of course STAB.

This is a set I found while poking around PO:
Mandibuzz (F) @ Leftovers
Trait: Overcoat
EVs: 104 HP / 216 Def / 188 SDef
Calm Nature (+SDef, -Atk)
- Dark Pulse
- Tailwind
- Toxic
- Roost
Ev's give it more bulk and make both Defenses hit 300. Dark Pulse gives STAB, and has the usefulness to be used if you have been Taunted. Tailwind raises team speed, so this guy is a Staller, Wall, and Support all rolled into one! Toxic is standard for every Staller, and Wall to boot. Roost is recovery in Flying form.

Phazer

This is an anti-stat booster set, as everyone knows stat boosters can be exceedingly frustrating but Mandibuzz can take care of that. Whirlwind blows the Pokemon and it's boosts away. Roost is for healing. Substitute prevents the foe from hurting you which is very useful, but if you do not have Toxic-spikes support on your team Toxic can be useful. Punishment is there not only there for STAB and so Taunt does not ruin you, but because it hits hard on Stat boosters with an extra +20 base-power per boost starting at 60 Base-power.

Defog: Gets rid of any entry hazards. It also gets rid of yours so only use this move if you have mons that are heavily affected by stealth rocks and sticky web or make sure your mon that sets up hazards is alive.

Mandibuzz @ Leftovers

This thing checks things like Aegislash and buff sweepers with complete sweg. Even if those guys aren't present, this set here still gets it done in physical walling. Foul Play is a great move overall, destroying Sword Dancing pokes and the physical attackers it walls, even being able to 2KO an Aegislash even after getting Kings Shielded. Knock Off gets rid of pesky items and has decent power with STAB. Toxic lays down a stall, if that's what you so choose or you could go for the support with Tailwind. Defog is for people that don't appreciate hazards, Roost is also an option if you don't have a Wish passer.

once this guy has set up, he is almost invincible. I have tried this on Pokemon showdown, it worked great. Most people just rage quit. The only issue is Electric types. With mostly special attacks, Iron Defense won't matter. I would suggest him for double battles as you can use Follow Me on it's partner, alouing Mandibuzz to set up, or a strong Ground type to kill of Electric type's.